Research on AC Protection Scheme Under the Background of Power Electronics

doi:10.12204/j.issn.1000-7229.2020.07.010

Abstract

Abstract: The application of a lot of power electronic equipment has caused a large change in the fault characteristics of the AC system， and the existing protection schemes faces greater challenge. This paper firstly analyzes the waveform characteristics of AC line fault current in different fault scenarios， such as pure AC systems， DC transmission systems and new energy grid-connection， and then a new protection scheme based on identification of transient current spectrum is proposed. At last， the effect of current transformer， sampling frequency and data window length is analyzed. The new protection scheme has many application scenarios， fast operation， and simple implementation. The conclusions are verified by the simulation results of EMTDC / PSCAD and prototype test.

Key words: power electronics, correlation coefficient, protection scheme, performance test

CLC Number:

TM 774

SHEN Hongming， XIAO Zhihong， LIU Ying， GAO Xu， WANG Ziqi， LI Tiechen， DU Na. Research on AC Protection Scheme Under the Background of Power Electronics[J]. Electric Power Construction, doi: 10.12204/j.issn.1000-7229.2020.07.010.

References

［1］宋国兵，陶然，李斌，等. 含大规模电力电子装备的电力系统故障分析与保护综述［J］. 电力系统自动化， 2017， 41（12）: 2-12.
SONG Guobing， TAO Ran， LI Bin， et al. Survey of fault analysis and protection for power system with large scale power electronic equipments［J］. Automation of Electric Power Systems， 2017， 41（12）: 2-12.
［2］朱蜀，刘开培，秦亮，等. 电力电子化电力系统暂态稳定性分析综述［J］. 中国电机工程学报， 2017， 37（14）: 3948-3962.
ZHU Shu， LIU Kaipei， QIN Liang， et al. Analysis of transient stability of power electronics dominated power system: An overview［J］. Proceedings of the CSEE， 2017， 37（14）: 3948-3962.
［3］康重庆，姚良忠.高比例可再生能源电力系统的关键科学问题与理论研究框架［J］.电力系统自动化，2017，41（9）:2-11.
KANG Chongqing，YAO Liangzhong.Key scientific issues and theoretical research framework for power systems with high proportion of renewable energy［J］.Automation of Electric Power Systems，2017，41（9）:2-11.
［4］袁志昌，郭佩乾，刘国伟，等. 新能源经柔性直流接入电网的控制与保护综述［J］. 高电压技术， 2020， 46（5）: 1473-1488.
YUAN Zhichang， GUO Peiqian， LIU Guowei， et al. Review on control and protection for renewable energy integration through VSC-HVDC［J］. High Voltage Engineering， 2020， 46（5）: 1473-1488.
［5］胡家兵，袁小明，程时杰.电力电子并网装备多尺度切换控制与电力电子化电力系统多尺度暂态问题［J］.中国电机工程学报，2019，39（18）：5457-5467.
HU Jiabing， YUAN Xiaoming， CHENG Shijie. Multi-time scale transients in power-electronized power systems considering multi-time scale switching control schemes of power electronics apparatus［J］. Proceeding of the CSEE， 2019， 39（18）: 5457-5467.
［6］申洪明，黄少锋，费彬. HVDC换相失败暂态特性及其对差动保护的影响分析和对策［J］. 电力自动化设备， 2015， 35（4）: 109-114， 120.
SHEN Hongming， HUANG Shaofeng， FEI Bin. Transient characteristic of HVDC system during commutation failure， its effect on differential protection and countermeasures［J］. Electric Power Automation Equipment， 2015， 35（4）: 109-114， 120.
［7］王栋，高厚磊，李文琳，等. 方向纵联保护对LCC-HVDC逆变侧交流线路的适应性分析［J］. 电力系统保护与控制， 2018， 46（18）: 33-40.
WANG Dong， GAO Houlei， LI Wenlin， et al. Adaptability analysis of directional pilot protection for AC transmission lines connected to LCC-HVDC inverter station［J］. Power System Protection and Control， 2018， 46（18）: 33-40.
［8］李彦宾，贾科，毕天姝，等. 逆变型电源对距离保护的影响机理分析［J］. 电力系统保护与控制， 2018， 46（16）: 54-59.
LI Yanbin， JIA Ke， BI Tianshu， et al. Impact of inverter-interfaced renewable energy generators on distance protection［J］. Power System Protection and Control， 2018， 46（16）: 54-59.
［9］黄少锋，申洪明，刘玮，等. 交直流互联系统对换流变压器差动保护的影响分析及对策［J］. 电力系统自动化， 2015， 39（23）: 158-164.
HUANG Shaofeng， SHEN Hongming， LIU Wei， et al. Effect of AC/DC interconnected network on transformer protection and its countermeasures［J］. Automation of Electric Power Systems， 2015， 39（23）: 158-164.
［10］戴志辉，苏怀波，王雪，等. 交直流混联系统单极接地故障对变压器直流偏磁及电流差动保护的影响分析［J］. 电力建设， 2018， 39（9）: 39-46.
DAI Zhihui， SU Huaibo， WANG Xue， et al. Impact of pole-to-ground faults on transformer DC bias and differential current protection in hybrid AC/DC power systems［J］. Electric Power Construction， 2018， 39（9）: 39-46.
［11］王聪博，贾科，毕天姝，等. 基于暂态电流波形相似度识别的柔性直流配电线路保护［J］. 电网技术，2019，43（4）：9-17.
WANG Congbo， JIA Ke， BI Tianshu， et al. Transient current waveform similarity identification based protection for flexible DC distribution system［J］. Power System Technology， 2019，43（4）：9-17.
［12］吕承，邰能灵，郑晓冬，等. 基于暂态信号距离辨识的MMC-HVDC线路保护方案［J］. 水电能源科学， 2018， 36（8）: 185-188.
LV Cheng， TAI Nengling， ZHENG Xiaodong， et al. Protection scheme for MMC-HVDC lines based on transient signal distance identification［J］. International Journal Hydroelectric Energy， 2018， 36（8）: 185-188.
［13］申洪明，宋璇坤，姚玉海，等. 规模化电力电子装置接入对换流变保护策略的影响分析及对策研究［J］. 高压电器， 2020， 56（3）: 230-233， 252.
SHEN Hongming， SONG Xuankun， YAO Yuhai， et al. Effect of large-scale power electronic equipment on converter transformer protection strategy and countermeasure［J］. High Voltage Apparatus， 2020， 56（3）: 230-233， 252.
［14］FANG Y， JIA K， YANG Z， et al. Impact of inverter-interfaced renewable energy generators on distance protection and an improved scheme［J］. IEEE Transactions on Industrial Electronics， 2019， 66（9）: 7078-7088.
［15］陈乐，薄志谦，林湘宁，等. 基于波形相似度比较的线路快速纵联保护研究［J］. 中国电机工程学报， 2017， 37（17）: 5018-5027.
CHEN Le， BO Zhiqian， LIN Xiangning， et al. Waveform similarity comparison based high-speed pilot protection for transmission line［J］. Proceedings of the CSEE， 2017， 37（17）: 5018-5027.
［16］上官鑫，秦文萍，夏福良，等. 基于暂态电压Pearson相关性的MMC多端柔性直流配电网单极接地故障保护方案［J］.高电压技术，2020，46（5）：1740-1749.
SHANGGUAN Xin，QIN Wenping，XIA Fuliang，et al. Pole-to-ground fault protection scheme for MMC multi-terminal flexible DC distribution network based on Pearson correlation of transient voltage［J］. High Voltage Engineering， 2020， 46（5）: 1740-1749.
［17］李秀敏，江卫华. 相关系数与相关性度量［J］. 数学的实践与认识， 2006， 36（12）: 188-192.
LI Xiumin， JIANG Weihua. Research on linear correlation and dependence measure［J］. Mathematics in Practice and Theory， 2006， 36（12）: 188-192.

[1]	WANG Weixian， ZHU Jie， TIAN Heping， CHEN Zhen， YUAN Xiaoxi. Design and Implementation of Information Security Protection Scheme of Electric Vehicle Charging Pile-Background Service Management Center [J]. Electric Power Construction, 2019, 40(5): 55-62.
[2]	YANG Zhiyu， LIU Junyong， LIU Youbo， WEN Lili. Transmission Line Importance Evaluation Based on Timing Operating Data [J]. Electric Power Construction, 2019, 40(1): 77-85.
[3]	DAI Zhihui，SU Huaibo，LIU Ningning，ZHANG Cheng. Protection Scheme Based on Current Correlation for DC Lines Against Single-pole Ground Faults [J]. Electric Power Construction, 2018, 39(7): 74-80.
[4]	YIN Changxin, LI Yun, CHEN Ping, HUANG Renle, CHANG Qiankun，ZHOU Yang. Protection Scheme Design for Interconnecting Device Under Arm Flashover Fault#br# [J]. Electric Power Construction, 2017, 38(2): 91-.
[5]	ZHANG Zece, WANG Xiuli, HOU Yushen. Economical Arrester Protection Scheme and Arrester Parameters Selection for ±800 kV UHV DC Converter Station [J]. ELECTRIC POWER CONSTRUCTION, 2015, 36(6): 1-6.
[6]	WANG Zhijun. Pulsed Arc Welding Process and Performance Test of Super304H Steel [J]. ELECTRIC POWER CONSTRUCTION, 2013, 34(6): 109-112.
[7]	. Experimental Study of Passive Film Formed by Oxgenated Treatment of Boiler Feedwater [J]. ELECTRIC POWER CONSTRUCTION, 2011, 32(7): 68-72.